java多文件打包下载方法

/**

* 根据文件，进行压缩，批量下载

* @param response

* @param files 文件转换成的byte字节流

* @throws Exception

*/

public void downloadBatchByFile(HttpServletResponse response, Map<String, byte[]> files, String zipName){

try{

response.reset();

zipName = java.net.URLEncoder.encode(zipName, "UTF-8");

response.setContentType("application/vnd.ms-excel;charset=UTF-8");

response.setHeader("Content-Disposition", "attachment;filename=" + zipName + ".zip");

ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());

BufferedOutputStream bos = new BufferedOutputStream(zos);

for(Entry<String, byte[]> entry : files.entrySet()){

String fileName = entry.getKey(); //每个zip文件名

byte[] file = entry.getValue(); //这个zip文件的字节

BufferedInputStream bis = new BufferedInputStream(new ByteArrayInputStream(file));

zos.putNextEntry(new ZipEntry(fileName));

int len = 0;

byte[] buf = new byte[10 * 1024];

while( (len=bis.read(buf, 0, buf.length)) != -1){

bos.write(buf, 0, len);

}

bis.close();

bos.flush();

}

bos.close();

}catch(Exception e){

e.printStackTrace();

}